Concealed hinge.



G. B. PARSONS. GONGEALED HINGE.

APPLICATION FILED Puts, 1914.

1,1 14,026, Patented Oct. 20, 1914.

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CARL B. PARSONS, 0F DETROIT, MIGI-IIGANZ.

CONCEALED HINGE.

Specification of Letters Patent. Patgnted Oct, 20, 1914, Applicationfiled February 5, 1914. Serial No. 816,671. a

3/100ths of an inch, so that the box-like mortise housing 2' will notrequire much cutting fromthe door post so as to Weaken that member.However, the upper and lower plates 9 and it would be so thin as to beof no support to the screws that fasten the pin-carrying element p tothe mortise casing. I, therefore, provide a pair of blocks 7' one ofwhich is attached to the upper and one to the lower plate by welding sothat these become an integral part of the mortise casing.

The upper and lower part of the mortise casing may now be applied to thedoor post by driving wood screws through the screw holes is. Above andbelow these screw holes 70 are located threaded holes Z which re ceivethe screws m that pass through the plate portions of the pin-carryingelement 7 These screws do not gointo the wood, hence when the mortisecasing is once aiiixed to the door post it is rarely necessary to removeit. The door may be easily removed by taking out the screws m and takingout the pin-carrying element 79 with the hinge arm. This particular formof pin-carrying 1 element 79, whether it is stamped, cast, or otherwisemanufactured, is peculiarly adapted for use with the mortise casing suchas I have shown, for the arrangement of the parts in the pincarryingelement 79 is such that no more space is taken in the mortise openingthan is absolutely required for the pivoting and the swinging radius ofthe arms; while the mortise casing constructed of relatively thin metalproperly lines the mortise casing without adding materially to the depthof the cut required. This thin mortise lining not only serves to linethe mortise opening, but by reason of the welding of the blocks upon theupper and lower plate it allows this element to carry the pin-carryingelement, thereby making the pin-carrying element 79 removable withouttaking out any of the wood screws.

WVhat I claim is:

1. A concealed hinge, comprising a mortise casing consisting of an upperand lower plate of thin metal and a box-like housing of thin metal, alsoblocks securely fastened to the upper and lower plates by such means aswelding, devices for fastenihg the upper and lower plates and the blocksto the door post, a pin-carrying element having theportion carrying apin fitting into To aZZ whom it may concern:

Be it known that I, CARL B. PARSONS, a citizen of the United States,residing at Detroit, county of Wayne, State of Michigan, have invented acertain new and useful Improvement in Concealed Hinges, and declare thefollowing to bea full, clear, and exact description of the same, such aswill. enable others skilled in the art to which it pertains to make anduse the same, reference being had to the accompanying drawings, whichform a part of this specification.

This invention relates to concealed hinges and has for its object aconcealed hinge which allows the removal of the door with out taking outthe wood screws from the door post, and which at the same time employs amortise casing of very thin metal so as to avoid a deep cut in the doorpost.

This invention is also arranged to clamp the turned-in edge of themetal. side panel in place.

Figure 1, is a front elevation of a concealed hinge partly broken away.Fig. 2, is a perspective of the pin-carrying element to which the hingearm is attached. Fig. 3, is a perspective of the mortise casing. Fig. 2is shown in relation to Fig. 3 as the structure of Fig. 2 would appearafter it has been removed from the structure shown in Fig. 3.

a indicates the face of the door post.

6 represents a portion of the door. To the door the conventionalconcealed hinge arm is attached. This is pivoted to the pin-carryingelement 39 by the pin (Z. This pin-carrying element p is the concealedhinge part that is described and claimed in my previous application No.794,569, with the exception that the edge which lies toward the outeredge of the door post is rabbeted as at c. This rabbet receives theturnedpver edge of the metal panel 7 and when the pin-carrying element127 is screwed to the door post it clamps the turned-over edge of thepanel securely in place. The pin-carrying element p comprises an upperand a lower plate portion, upper and lower mortise walls, and aconnecting strap on the side.

The mortise casing is formed of sheet metal which is drawn by suitabledies to form an upper and lower plate 9 and 7t, respectively, and abox-like housing 2'. This metal is relatively thin, approximatelyportions of the pin-carrying element securely against the plates of themortise casing, whereby the rabbeted edge may clamp the turned-in edgeof the metal body panel against the plates of the mortise casing.

In testimony whereof, I sign this spccification in the presence of twowitnesses.

GAR-L l3. PARSONS.

Witn esses STUART G. BARNES, MARIETTA E. RUDD.

Copies 01 this patent may be obtained for five cents each, Washington,D. C.

by addressing the Commissioner of Patents,

